Meiosis Worksheet

 

 

Use the links in this worksheet and answer the questions listed.

 

When finished save as your first name and last name and drag to the folder for your class

 

  1. Click here  http://biologyinmotion.com/cell_division/.
  2. Complete the “practice mitosis” and “practice meiosis” exercises
  3. In order to separate the chromosomes in half you will have to use the “shift” key
  4. How did the results of the two practice exercises differ? (Your own words)
  5. Click here http://www.pbs.org/wgbh/nova/baby/divi_flash.html
  6. How many steps to complete Mitosis?              Meiosis?
  7. Go to the last step in Meiosis. What does it say about “daughter cells” ?
  8. http://www.sirinet.net/~jgjohnso/geneticrecomb.html  What does it say in number 3 “New allele combinations”, about crossing over?
  9. Recently in the media news there has been a lot of discussion about “stem cells”. Click here http://www.dnalc.org/stemcells.html
  10. What is a blastocyst?        How many cells does it have?
  11. On the next slide what does it say about the potential of stem cells?
  12. Where are the cells placed to develop?
  13. Look at  the last slide. What do they hope these cells can be used for?
  14. Here is another picture of a blastocyst the pink cells are the stem cells. Where are they located?
  15. This shows you how big it is. Compare to the dime. (Here are  some real ones!)
  16. How many days after fertilization does the blastocycst implant?
  17. Look at the following about cancer ;  http://www.pbs.org/wgbh/nova/cancer/grow_flash.html       On the second to last slide it talks about why cancer cells are so dangerous.      What does “metastasize" mean ?         And why is it so dangerous?                                     
  18. Here are some more links you can observe on these topics; ( just for fun)

Photos of Lilly meiosis stages;

  1. Compare them to what you saw under the microscope

Lilly Meiosis 1

Lilly Meiosis 2

Lilly Anther ( pollen grains to contain sperm cells)

Lilly Ovary ( to become egg cells or ova)

How do the Lilly sperm cells and egg cells compare

Check out the following videos:

  1. Meiosis
  2. Mitosis  ( Click on the video that shows a comparison between Mitosis and Meiosis )   Using all we have learned, list at least 3 differences between Meiosis and Mitosis: